RTX Remix: Graphically Enhancing Older Games
Truly astonishing how much generalized modding seems to be possible through general DirectX (8/9) interfaces and official Nvidia provided tooling.
2kliksphilip did a video demonstration and exploration:
As an AMD graphics card user, it’s very unfortunate that RTX Remix is proprietary/exclusive Nvidia. Supposedly, the produced results should work on other graphics cards too though, although I did not find official docs about that.
For more technical details of how it works, see the GameWorks wiki: